In the new series “Finding Your Roots With Henry Louis Gates, Jr.,” the Harvard professor uses genetics and genealogy to shake the family trees of such famous faces as Robert Downey, Jr., Samuel L. Jackson and Harry Connick, Jr., below. (KOCE, 8 and 9 p.m.)

Wrasslin’ fan? The special “Rock/Cena: Once in a Lifetime” hypes a marquee match-up at next Sunday’s Wrestlemania. Gymnastics enthusiast? It’s the Olympics or bust when the drama “Make It or Break It” returns with new episodes. (USA, 8 p.m.; ABC Family, 9 p.m.)

TUESDAY

If ever a media mogul there was, the mogul from Oz is one because … well, perhaps because of some less-than-wonderful things he does. Scandal-plagued Australian-born billionaire Rupert Murdoch is profiled on a new “Frontline.” (KOCE, 10 p.m.)

WEDNESDAY

Archaeologists trek through the Yucatan in a “Quest for the Lost Maya” in this documentary. We hear they found another one of those stone calendars, and it turns out the world isn’t ending this Dec. 21, but sometime in the next… (KOCE, 10 p.m.)

THURSDAY

With his latest gig on “Two and a Half Men,” Ashton Kutcher must be too busy to emcee new episodes of “Punk’d” himself. But he’s lined up a slew of celebs to serve as guest hosts when his hidden-camera show returns after a five-year layoff. (MTV, 10 p.m.)

FRIDAY

In a world he never made: There is only one man who can bring “True Justice” to the mean streets of Seattle, and his name is … Steven Seagal. The onetime big-screen action hero and sometime reality-TV star is back in this new cop drama. (Reelz, 6 and 7 p.m.)

SATURDAY

If you’re gonna lose an Oscar, might as well be to a comedy legend. “Bridesmaids” co-star Kristen Wiig, below right, with Maya Rudolph, received a nomination for co-writing that off-color 2011 comedy, but it was Woody Allen who took home the original screenplay prize for his 2011 fantasy “Midnight in Paris.” (HBO, 8 p.m.; Starz, 9 p.m.)